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Certainty Turf Herbicide

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Certainty Turf Herbicide manufactured by Monsanto is an excellent selective, post-emergent herbicide containing 75% Sulfosulfuron. Certainty is easy to use and has a broad label for weeds. Using spot treatments or broadcast application, Certainty provides excellent control of dallisgrass and yellow and purple Nutsedge. Certainty Turf Herbicide is very safe on residential and commercial turf and can be spryed over st augustine and bermuda grass without damaging it.

Certainty Turf Herbicide is pet and child safe once dry. Keep people off of treated areas until dry.

Target Pests

Certainty Turf Herbicide is a selective herbicide that controls a broad list of annual and perennial grass and broadleaf weeds in highly managed turf ornamental and native grass sites including but not limited to Nutsedge Virginia Buttonweed Dallisgrass (in bermudagrass) annual bluegrass Tall Fescue etc. Please consult product label for detailed list of targeted weeds and grasses that Certainty is effective against.

For Use In

Certainty Turf Herbicide may be applied to residential and commercial sites including apartment complexes athletic fields cemeteries golf course fairways golf course roughs golf course tees and other golf course areas hotel properties nurseries office complexes parks public areas retail sites storage facilities school grounds sod and turfgrass seed farms and other highly managed turfgrass sites. This product is NOT for use on golf course putting greens.


For spot spray applications of Certainty Turf Herbicide mix 1-2.5 scoops in 1 gallon of water.

  • 1 gallon of Certainty Turf Herbicide solution will treat 1,000 square feet.
  • For maximum effectiveness add a non-ionic surfactant to your solution.

Do not mow immediately after treating grasses with Certainty Turf Herbicide. Apply Certainty when dew, fog, mist, and rain are not present.

Coverage Area

Each 1.25 oz bottle of Certainty Turf Herbicide will treat anywhere from 10,000 sq. ft.up to 35,000 sq. ft. depending upon the application used

Time to Kill

This product is absorbed by both the roots and the foliage of plants and rapidly inhibits the growth of susceptible weeds. Susceptible weed growth stops withing 24 hours of treatment even though visual symptoms are slow to develop. Susceptible weeds usually show yellowing or browning within 2 to 3 weeks. Warm, moist conditions following application will accelerate herbicidal activity. Cold, dry conditions will delay herbicidal activity. Weeds stressed by drought are less susceptible to this product.

Mix Rate

1-2.5 scoops per gallon of Water

Active Ingredient

Sulfosulfuron 75%

Certainty Turf Herbicide


Product Q & A

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Can Certainty be used to kill nutsedge in Liriope Muscarii?
A shopper on Dec 2, 2017
BEST ANSWER: Yes, Certainty can be applied as an over the top application of the Liriope, without harming the monkey grass and controlling the nutsedge.
will certainty kill tall fescue in blue grass?
jack w on Sep 3, 2017
BEST ANSWER: Best control of tall fescue is obtained when the product is applied at 1.25 ounces per acre followed by a second application of 1.25 ounces per acre at 21 to 28 days after he initial treatment.
What would be the hazards using this product around grapevines? I have Johnsongrass infestation between my trellises. Thanks.
Skulan on Jul 21, 2017
BEST ANSWER: It would kill the grapes if it comes in contact with the leaves of the grapevine.
How many fractions of an ounce is one scoop, or how many scoops of Certainty are there in 1.25 ounces? (1.25 ounces doesn't sound like much product for the price...)
ntex on Jul 14, 2017
BEST ANSWER: The rate for certainty is 0.8 grams per scoop.
I have a new lawn with Tall fescue growing in with regular fescue and Zoysia. Will using Certainty kill the tall fescue and noy harm the other good grasses?
Tony on Jun 26, 2017
BEST ANSWER: No, sorry that will not work.
How well does Certainty work on goose grass over Bermuda grass?
Ed on Jun 16, 2017
BEST ANSWER: Goosegrass is best controlled with preemergence herbicides. Herbicides that contain oxadiazon and then Post Emergent control you will want to look at Postemergence controls in bermudagrass includes foramsulfuron (Revolver). https://www.solutionsstores.com/revolver-herbicide
Will Certainty control weeds on a bentgrass green on a golf course in CA? If not can you use to control weeds on the fairways and tees?
Lindsay on May 31, 2017
BEST ANSWER: Broadleaf weed control in bentgrass You can use numerous herbicides to control broadleaf weeds in bentgrass turf. These include the phenoxy group, (2,4-D, dichlorprop, MCPA, MCPP, etc.), the benzoic acid group (dicamba) and the pyridinecarboxylic acid group (clopyralid, triclopyr).Certainty does not have bentgrass listed as a safe turf to apply to, I have included some suggestions.
I live in MN and our lawn is Kentucky Bluegrass. I have been infested with Quack grass. Will this product harm my Kentucky Bluegrass if used to get rid of my quackgrass. Thanks.
Dr Phil on May 15, 2017
BEST ANSWER: The product will definitely kill the quack grass. However, it is not labeled to be used on Kentucky bluegrass. The product will also kill Poa annua that is a weed of the same family and genus of the Kentucky bluegrass. You can contact the manufacture of this product for more information not listed on the label. Monsanto and the number is 314-694-1000
will certainty control quackgrass
Don on Apr 27, 2017
BEST ANSWER: Yes, Certainty will control quackgrass, rate is 1.25 to 2 ounce per gallon
Can Certainty Turf Herbicide bu used to control nut sedge in Asian jasmine?
Ron on Nov 7, 2016
BEST ANSWER: Yes Certainty will control nutsedge, but it would not be listed to work in Asian Jasmine, as this is specific for turf grass. Better to use Sedgehammer for the control of nutsedge in your ground cover.

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